Biosensor device

A biosensor device comprising:

• at least one pair of electrocardiographic electrodes that detect electrical signals of a living body;
• a respective insulating film disposed on each electrode of the at least one pair of electrocardiographic electrodes, each respective insulating film having a living body contact surface;
• at least two light emitting elements configured to each emit light in different wavelength ranges to the living body;
• a light receiver configured to receive reflected light from the living body;
• a processor circuit including an electrocardiographic signal detection unit that generates an electrocardiographic signal by differentially amplifying the electrical signals of the living body detected by the at least one pair of electrocardiographic electrodes, and a photo-plethysmographic signal detection unit that generates a photo-plethysmographic signal based on the light emitted from the light emitter and the reflected light received by the light receiver;
• a base plate on which the at least two light emitting elements, the light receiver, and at least part of the processor circuit are mounted;
• a peripheral wall reflector positioned around each of the at least two light emitting elements and the light receiver;
• and
• at least one clamp circuit including at least one high-impedance element connected to the electrocardiographic signal detection unit, wherein a potential at a connected end of the clamp circuit is held constant, and an impedance at the connected end of the electrocardiographic signal detection unit is larger than an impedance of the clamp circuit, wherein
• at least one electrode of the at least one pair of electrocardiographic electrodes is a light transmissive electrocardiographic electrode made of an electroconductive material having light transparency in a wavelength range of the light emitted from each of the at least two light emitting elements,
• the respective insulating film disposed on the light transmissive electrocardiographic electrode is a light transmissive insulating film made of an insulating material having light transparency in the wavelength range of the light emitted from each of the at least two light emitting elements.